What are the four main tissue types and their subtypes?

Describe the function of the endomembrane system? what organelles are involved?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.